Usually ARC and optical have to be turned on in the TV menu. You may also have to turn the TV speakers off too.
The ARC and optical connections at the receiver may have to be assigned to an input name in the input set up menu.
Thanks for your valuable information. After setting up ARC option in Receiver setup menu, the audio output from TV is being received by the receiver. It worked finally.
ARC and optical was turned on in the TV menu.